Added a example.zig

src/example.zig

@@ -0,0 +1,43 @@
+const std = @import("std");
+const GpuDevice = @import("GpuDevice.zig");
+const GpuAllocator = @import("GpuAllocator.zig");
+const GpuPipeline = @import("GpuPipeline.zig");
+const Vec = @import("Vec.zig");
+
+const c = @import("utils.zig").c;
+
+pub fn main(init: std.process.Init) !void {
+    const allocator = init.gpa;
+
+    const device = try GpuDevice.init(.{ .vram_bytes_limit = 4 * 1024 * 1024 * 1024 });
+    defer device.deinit();
+
+    var gloc = try GpuAllocator.init(allocator, device);
+    defer gloc.deinit();
+
+    const add_pip = try GpuPipeline.init(device, @embedFile("shaders/add.wgsl"));
+    defer add_pip.deinit();
+
+    const data_a = try allocator.alloc(f32, 1024);
+    defer allocator.free(data_a);
+    const data_b = try allocator.alloc(f32, 1024);
+    defer allocator.free(data_b);
+
+    for (0..1024) |i| {
+        data_a[i] = @floatFromInt(i);
+        data_b[i] = @floatFromInt(1024 - 1 - i);
+    }
+
+    const a = try Vec.initLoad(&gloc, data_a);
+    defer a.deinit();
+    const b = try Vec.initLoad(&gloc, data_b);
+    defer b.deinit();
+
+    const sum = try a.run(&gloc, b, add_pip);
+    defer sum.deinit();
+
+    const out = try sum.read(&gloc, allocator);
+    defer allocator.free(out);
+
+    std.debug.print("{any}\n", .{out});
+}